Intramolecular Kulinkovich–de Meijere reactions of various disubstituted alkenes bearing amide groups
摘要:
A range of amides fitted with (E) or (Z) disubstituted alkene groups were prepared and evaluated in intramolecular Kulinkovich-de Meijere reactions. The corresponding aminocyclopropanes were obtained with high diastereoselectivity. Good yields could be achieved with substrates bearing suitable substitutions at the olefin moieties. (C) 2008 Elsevier Ltd. All rights reserved.
Intramolecular Kulinkovich–de Meijere reactions of various disubstituted alkenes bearing amide groups
摘要:
A range of amides fitted with (E) or (Z) disubstituted alkene groups were prepared and evaluated in intramolecular Kulinkovich-de Meijere reactions. The corresponding aminocyclopropanes were obtained with high diastereoselectivity. Good yields could be achieved with substrates bearing suitable substitutions at the olefin moieties. (C) 2008 Elsevier Ltd. All rights reserved.
A convenient titanium-mediated intermolecular alkyne–carbonate coupling reaction
作者:Andrzej Wolan、Frédéric Cadoret、Yvan Six
DOI:10.1016/j.tet.2009.07.015
日期:2009.9
A direct diastereoselective titanium-mediated intermolecular coupling of internal alkynes with dialkyl carbonates under Kulinkovich-type reaction conditions is presented. The influence of the structures of the coupling partners on the yields and regioselectivities of this transformation is described. (C) 2009 Elsevier Ltd. All rights reserved.